Micro-Symbol LMON.;6 Thursday, October 26, 1978 10:07:34 PAGE 1 ;************************************************************************ ; * ; * ; SMITCH-0 LOCAL OPERATING SYSTEM * ; * ; * ; copyright 1978, Tom M. Mitchell and Reid G. Smith * ; * ;************************************************************************ ; The local operating system provides a number of utility functions ; In addition it enables easy access to the Data Media Emulation ; Software as a "virtual terminal". At the present time, the Local ; Operating System is downloaded from the host, although it could ; be implemented in EPROM. ; The functions provided by the Local Operating System are as follows: ; 1. Break the line connection to the host ; 2. Set/Reset the 8th bit for characters in video memory. ; 3. Format the screen (normal or inverse video, dual intensity, blink). ; 4. Logout the job from the host (works at least for TENEX and TOPS-10). ; 5. Save and Restore screen. ; 6. Transmit screen to host. ; The Local Operating System is called by the two character ; sequence ^U ^V.

Micro-Symbol LMON.;6 Thursday, October 26, 1978 10:07:35 PAGE 2 0040 TERM EQU 40H ; addresses of pointers to 2708 Data Media ; Emulator routines 0042 INIT EQU 42H 0044 DM EQU 44H 0046 PCHAR EQU 46H 0048 MULT EQU 48H 004A IST EQU 4AH 004C LSTAT EQU 4CH 004E FULL EQU 4EH 0050 HALF EQU 50H 0052 TXCHR EQU 52H 0054 PQUE EQU 54H 0056 GQUE EQU 56H 0058 GQ EQU 58H 005A LOCAL EQU 5AH 005C LINE EQU 5CH ; Terminal Flags 1007 BKMOD EQU 1007H ; blink mode on/off = 200q/0 1006 IDMOD EQU 1006H ; i/d mode on/off = 377q/0 1008 RLMOD EQU 1008H ; roll mode on/off = 377q/0 100A HDMOD EQU 100AH ; half duplex mode on/off = 377q/0 1009 LCMOD EQU 1009H ; local mode on/off = 377q/0 1002 CURSE EQU 1002H ; cursor address location 003F USTAT EQU 77Q ; USART command port 003C PICU EQU 74Q ; local constants 003B RBELL EQU 73Q ; audio bell select 003A OFCUR EQU 72Q ; turn off the cursor 0039 ONCUR EQU 71Q ; turn on the cursor 0002 STX EQU 2 ; ^b 000D CR EQU 13 ; <cr> 000A LF EQU 10 ; <lf> 0017 EEOL EQU 23 ; ^w - erase to end of line 0852 DBGIN EQU 4122Q ; start address of first line of normal video memory 0FE8 DEND EQU 7750Q ; last address of last line of normal video memory 0018 NLINE EQU 24 ; number of lines per screen (ignoring top line) 0050 NCHAR EQU 80 ; number of characters displayed per line

Micro-Symbol LMON.;6 Thursday, October 26, 1978 10:07:35 PAGE 3 13FD ORG 13FDH ; starting address for local operating system 13FD 3E33 MVI A,33H 13FF D33F OUT USTAT ; turn off modem receiver 1481 2A4000 LHLD TERM ; call term to clear the queue 1404 CD9417 CALL ICALL 1407 CD7815 CALL SAVEM ; save terminal modes then reset 140A 3E0C MON0: MVI A,14Q ; enable interrupts 140C D33C OUT PICU 140E FB EI 140F D339 OUT ONCUR ; turn on the cursor 1411 2A0210 LHLD CURSE ; refresh the cursor position 1414 7E MOV A,M 1415 D33B OUT RBELL ; ring the bell 1417 11F218 MON: LXI D,PROMP ; load prompt string address 141A CD0017 CALL INTRP ; interpret the string 141D 2A5600 LHLD GQUE ; get keyboard char in A reg 1420 CD9417 CALL ICALL 1423 CDE916 CALL EXEC ; process/display character 1426 CD7E17 CALL RAISE ; switch to upper case ; The following code interprets commands and sends control ; to the appropriate routine 1429 FE42 CPI 'B' 142B CA6914 JZ BREAK ; B: break the line connection 142E FE44 CPI 'D' 1430 CA7014 JZ BLNK ; D: set/reset eighth bit mode 1433 FE45 CPI 'E' 1435 CA7F14 JZ EXIT ; E: exit 1438 FE46 CPI 'F' 143A CA9614 JZ FORMT ; F: format screen (line status words) 143D FE47 CPI 'G' 143F CAC014 JZ GO ; G: go to location (for running programs) ; follow the command word with a 16 bit ; octal address 1442 FE4C CPI 'L' 1444 CADD14 JZ KILLJ ; L: logout connected job 1447 FE52 CPI 'R' 1449 CA1E15 JZ RESTR ; R: restore screen

Micro-Symbol LMON.;6 Thursday, October 26, 1978 10:07:36 PAGE 3-2 144C FE53 CPI 'S' 144E CA4215 JZ SAVES ; S: save screen 1451 FE54 CPI 'T' ; T: transmit screen 1453 CA5415 JZ TRNSMT 1456 FE3F CPI '?' 1458 CA6F15 JZ HELP ; ?: help - display list of commands 145B FE20 CPI 40Q ; if control char, it has already been 145D DA1714 JC MON ; processed

Micro-Symbol LM0N.;6 Thursday, October 26, 1978 10:07:36 PAGE 4 ; Command Error Routine 1460 11AF17 ERR: LXI D,ERRM1 ; illegal command 1463 CD0017 CALL INTRP ; print msg and try again 1466 C31714 JMP MON ;************************************************************************ ; Send break character 1469 3E08 BREAK: MVI A,10Q 146B D33F OUT USTAT 146D C31714 JMP MON ;************************************************************************ ; Eighth bit display mode command routine 1470 11CD18 BLNK: LXI D,LINK ; output message 1473 CD0017 CALL INTRP 1476 CD0B17 CALL YAN ; get response 1479 D2DC15 JNC RBLNK ; carry = 0 => no 147C C3CF15 JMP SBLNK ;************************************************************************ ; Exit Routine 147F 110519 EXIT: LXI D,XIT 1482 CD0017 CALL INTRP 1485 CDAD15 CALL UNSVM ; return from local monitor to terminal 1488 3E37 MVI A,37H ; turn on modem receiver 148A D33F OUT USTAT ; this should really be done in local and ; line routines 148C 3E0F MVI A,17Q 148E D33C OUT PICU 1490 E1 POP H ; this completes the call from the keyboard 1491 D1 POP D ; interrupt service routine 1492 C1 POP B 1493 F1 POP PSW 1494 FB EI 1495 C9 RET

Micro-Symbol LMON.;6 Thursday, October 26, 1978 10:07:37 PAGE 5 ;************************************************************************ ; Screen formatting routine ; sets line status of each line to entered digit 1496 11E418 FORMT: LXI D,ORMAT ; output message 1499 CD0017 CALL INTRP 149C 11D317 FORM1: LXI D,FPRMP ; prompt 149F CD0017 CALL INTRP 14A2 CD4517 CALL GTOCT ; get line status word 14A5 D2B814 JNC ABRTF ; check for bad data 14A8 0E00 MVI C,0 14AA 45 MOV B,L ; set up arguments 14AB 2A4A00 LHLD IST 14AE 110400 LXI D,4 ; calculate correct address of routine 14B1 19 DAD D ; add 4 to obtain ist1 address - ; this should be available 14B2 CD9417 CALL ICALL 14B5 C31714 JMP MON 14B8 FE1B ABRTF: CPI 33Q ; abort on ESC 14BA CA1714 JZ MON 14BD C39C14 JMP FORM1 ;************************************************************************ ; Go Routine - Jump To Octal Address with provision for return 14C0 11E517 GO: LXI D,GOM ; display message 14C3 CD0017 CALL INTRP 14C6 11E917 GO1: LXI D,GPRMP ; prompt 14C9 CD0017 CALL INTRP 14CC CD4517 CALL GTOCT ; get address 14CF D2D514 JNC ABRTG ; check for bad address 14D2 CD9417 CALL ICALL ; jump to address (with provision on stack for return) 14D5 FE1B ABRTG: CPI 33Q ; abort on ESC 14D7 CA1714 JZ MON 14DA C3C614 JMP GO1

Micro-Symbol LMON.;6 Thursday, October 26, 1978 10:07:37 PAGE 6 ;************************************************************************ ; Logout connected job 14DD 11DE18 KILLJ: LXI D,OGOUT 14E0 CD0017 CALL INTRP 14E3 0603 MVI B,3 ; transmit ^c - need 4 to be sure!?! 14E5 2A5200 LHLD TXCHR 14E8 CD9417 CALL ICALL 14EB 0603 MVI B,3 ; transmit ^c 14ED 2A5200 LHLD TXCHR 14F0 CD9417 CALL ICALL 14F3 0603 MVI B,3 ; transmit ^c 14F5 2A5200 LHLD TXCHR 14F8 CD9417 CALL ICALL 14FB 0603 MVI B,3 ; transmit ^c 14FD 2A5200 LHLD TXCHR 1500 CD9417 CALL ICALL 1503 064B MVI B,'K' ; k 1505 2A5200 LHLD TXCHR 1508 CD9417 CALL ICALL 150B 060D MVI B,CR ; carriage return 150D 2A5200 LHLD TXCHR 1510 CD9417 CALL ICALL 1513 060D MVI B,CR ; carriage return 1515 2A5200 LHLD TXCHR 1518 CD9417 CALL ICALL 151B C31714 JMP MON ;************************************************************************ ; Restore screen 151E 11F718 RESTR: LXI D,RESTM 1521 CD0017 CALL INTRP 1524 3A0810 LDA RLMOD ; save roll mode setting 1527 F5 PUSH PSW 1528 3E00 MVI A,0 ; turn off roll mode during unpacking 152A 320810 STA RLMOD 152D 211C19 LXI H,SQUEUE ; initialize ptr. to beginning of screen 1530 221A19 SHLD SQPTR 1533 CD7116 CALL UNPKS 1536 3E1A MVI A,26 ; ^z (cursor up) 1538 CDE916 CALL EXEC ; backup the cursor to reuse prompt line 153B F1 POP PSW ; restore roll mode 153C 320810 STA RLMOD 153F C31714 JMP MON ;************************************************************************

Micro-Symbol LMON.;6 Thursday, October 26, 1978 10:07:38 PAGE 6-2 ; Save screen 1542 11A417 SAVES: LXI D,AVEM 1545 CD0017 CALL INTRP 1548 211C19 LXI H,SQUEUE ; initialize ptr to beginning of screen 154B 221A19 SHLD SQPTR 154E CD4016 CALL PCKS 1551 C31714 JMP MON ;************************************************************************ ; Transmit Screen 1554 119517 TRNSMT: LXI D,ANSM 1557 CD0017 CALL INTRP 155A 115208 LXI D,DBGIN ; initialize display memory pointer 155D 215208 LXI H,DBGIN ; initialize display memory pointer 1560 0E00 MVI C,0 ; initialize line counter 1562 CDC416 TRNS0: CALL TRNSL ; transmit a line to the host 1565 0C INR C ; bump line counter 1566 79 MOV A,C ; transmitted 23 lines? 1567 FE17 CPI NLINE-1 1569 C26215 JNZ TRNS0 ; no - more lines to transmit 156C C31714 JMP MON ; yes - return

Micro-Symbol LMON.;6 Thursday, October 26, 1978 10:07:38 PAGE 7 ;************************************************************************ ; Help routine 156F 11F617 HELP: LXI D,HELPM ; output help message, and return 1572 CD0017 CALL INTRP 1575 C31714 JMP MON ;************************************************************************ ; The following routines are utilities used to assist in the ; implementation of some of the functions. ;************************************************************************ ; Save all terminal modes 1578 3A0710 SAVEM: LDA BKMOD ; get each mode... 157B 321619 STA BKT ; and save it in temporary location 157E 3A0610 LDA IDMOD 1581 321519 STA IDT 1584 3A0810 LDA RLMOD 1587 321719 STA RLT 158A 3A0910 LDA LCMOD 158D 321819 STA LCT 1590 3A0A10 LDA HDMOD 1593 321919 STA HDT 1596 3E00 MVI A,0 1598 320710 STA BKMOD ; turn blink mode off 159B 320610 STA IDMOD ; and i/d mode 159E 3EFF MVI A,377Q 15A0 320A10 STA HDMOD ; turn on other modes 15A3 320910 STA LCMOD 15A6 320810 STA RLMOD 15A9 CDE715 CALL TOPLN ; refresh top line messages 15AC C9 RET ;************************************************************************ ; Restore all terminal modes 15AD 3A1619 UNSVM: LDA BKT 15B0 320710 STA BKMOD 15B3 3A1519 LDA IDT 15B6 320610 STA IDMOD 15B9 3A1719 LDA RLT 15BC 320810 STA RLMOD 15BF 3A1819 LDA LCT 15C2 320910 STA LCMOD 15C5 3A1919 LDA HDT

Micro-Symbol LMON.;6 Thursday, October 26, 1978 10:07:39 PAGE 7-2 15C8 320A10 STA HDMOD 15CB CDE715 CALL TOPLN ; refresh top line status information 15CE C9 RET

Micro-Symbol LMON.;6 Thursday, October 26, 1978 10:07:39 PAGE 8 ;************************************************************************ ; Set blink mode 15CF 3E0E SBLNK: MVI A,14 ; ^n 15D1 CDE916 CALL EXEC 15D4 3E80 MVI A,200Q ; this is 'sticky'. change terminal blink mode too. 15D6 321619 STA BKT 15D9 C31714 JMP MON ;************************************************************************ ; Reset blink mode 15DC 3E00 RBLNK: MVI A,0 ; reset both blink mode flags 15DE 320710 STA BKMOD 15E1 321619 STA BKT 15E4 C31714 JMP MON ;************************************************************************ ; Refresh top line status information 15E7 3A0A10 TOPLN: LDA HDMOD 15EA FE00 CPI 0 15EC CAF515 JZ FD ; check for full/half duplex 15EF 2A5000 LHLD HALF 15F2 C3F815 JMP C1 15F5 2A4E00 FD: LHLD FULL 15F8 CD9417 C1: CALL ICALL 15FB 3A0910 LDA LCMOD ; check local/on-line mode 15FE FE00 CPI 0 1600 CA0916 JZ LN 1603 2A5A00 LHLD LOCAL 1606 C30C16 JMP C2 1609 2A5C00 LN: LHLD LINE 160C CD9417 C2: CALL ICALL 160F 3A0810 LDA RLMOD ; save 3 modes 1612 F5 PUSH PSW 1613 3A0710 LDA BKMOD 1616 F5 PUSH PSW 1617 3A0610 LDA IDMOD 161A F5 PUSH PSW 161B 3E18 MVI A,24 ; clear these 3 modes 161D CDE916 CALL EXEC 1620 F1 POP PSW ; retrieve correct idmod 1621 FE00 CPI 0 1623 CA2B16 JZ BK 1626 3E10 MVI A,16 ; and reset mode if needed 1628 CDE916 CALL EXEC

Micro-Symbol LMON.;6 Thursday, October 26, 1978 10:07:40 PAGE 9 162B F1 BK: POP PSW ; do same for blink mode 162C FE00 CPI 0 162E CA3616 JZ RL 1631 3E0E MVI A,14 1633 CDE916 CALL EXEC 1636 F1 RL: POP PSW ; and for roll mode 1637 FE00 CPI 0 1639 C8 RZ 163A 3E1D MVI A,29 163C CDE916 CALL EXEC 163F C9 RET ;************************************************************************ ; Save screen on screen queue 1640 215208 PCKS: LXI H,DBGIN ; display mem ptr 1643 115208 LXI D,DBGIN ; line address 1646 0E00 MVI C,0 1648 CD9416 PCK0: CALL ELCNT ; determine number of chars in this line 164B FE00 PCK1: CPI 0 164D CA5916 JZ EOL ; end of line? 1650 46 MOV B,M ; get next char, and bump ptrs. 1651 23 INX H 1652 3D DCR A 1653 CDB916 CALL PUT ; save char 1656 C34B16 JMP PCK1 1659 0617 EOL: MVI B,EEOL 165B CDB916 CALL PUT ; mark end of line with eol 165E 215100 LXI H,NCHAR+1 1661 19 DAD D ; update ptrs 1662 54 MOV D,H 1663 5D MOV E,L 1664 0C INR C 1665 79 MOV A,C 1666 FE17 CPI NLINE-1 ; don't save last line (command line) 1668 C24816 JNZ PCK0 ; more lines to save 166B 0600 MVI B,0 166D CDB916 CALL PUT 1670 C9 RET

Micro-Symbol LMON.;6 Thursday, October 26, 1978 10:07:40 PAGE 10 ;************************************************************************ ; Unpack screen 1671 3E02 UNPKS: MVI A,STX ; home the cursor 1673 CDE916 CALL EXEC 1676 CDAE16 UNP1: CALL GET 1679 FE00 CPI 0 167B CA9316 JZ UNPRT ; end of screen marked by '0' 167E CDE916 CALL EXEC 1681 FE17 CPI EEOL 1683 C27616 JNZ UNP1 1686 3E0D MVI A,CR 1688 CDE916 CALL EXEC 168B 3E0A MVI A,LF 168D CDE916 CALL EXEC 1690 C37616 JMP UNP1 1693 C9 UNPRT: RET ;************************************************************************ ; Determine column position of last char in line ; D,E reg contain address of first char ; return answer in a reg 1694 E5 ELCNT: PUSH H 1695 C5 PUSH B 1696 214F00 LXI H,NCHAR-1 1699 19 DAD D ; H,L now has address of last displayable position 169A 0650 MVI B,NCHAR ; on line of display memory 169C 7E ELC1: MOV A,M 169D FE20 CPI ' ' 169F C2AA16 JNZ ELC2 16A2 05 DCR B 16A3 2B DCX H 16A4 78 MOV A,B 16A5 FE00 CPI 0 16A7 C29C16 JNZ ELC1 16AA 78 ELC2: MOV A,B 16AB C1 POP B 16AC E1 POP H 16AD C9 RET

Micro-Symbol LMON.;6 Thursday, October 26, 1978 10:07:41 PAGE 11 ;************************************************************************ ; Get char from screen queue into A reg 16AE E5 GET: PUSH H 16AF 2A1A19 LHLD SQPTR 16B2 7E MOV A,M 16B3 23 INX H 16B4 221A19 SHLD SQPTR 16B7 E1 POP H 16B8 C9 RET ;************************************************************************ ; Put char from B reg. onto screen queue 16B9 E5 PUT: PUSH H 16BA 2A1A19 LHLD SQPTR 16BD 70 MOV M,B 16BE 23 INX H 16BF 221A19 SHLD SQPTR 16C2 E1 POP H 16C3 C9 RET ;************************************************************************ ; Transmit one line of display memory to host ; starting address in D, line counter in C 16C4 CD9416 TRNSL: CALL ELCNT ; find column of last character in line 16C7 FE00 TR1: CPI 0 ; end of line? 16C9 CADA16 JZ TEOL ; yes - transmit cr 16CC 46 MOV B,M ; get the character and transmit it 16CD E5 PUSH H ; temp store for current character position 16CE 2A5200 LHLD TXCHR 16D1 CD9417 CALL ICALL 16D4 E1 POP H 16D5 23 INX H ; bump pointers for next character 16D6 3D DCR A 16D7 C3C716 JMP TR1 ; do for all characters in the 1ine 16DA 060D TEOL: MVI B,CR ; terminate line with cr 16DC 2A5200 LHLD TXCHR 16DF CD9417 CALL ICALL 16E2 215100 LXI H,NCHAR+1 16E5 19 DAD D ; bump pointer 16E6 54 MOV D,H 16E7 5D MOV E,L 16E8 C9 RET ;************************************************************************

Micro-Symbol LMON.;6 Thursday, October 26, 1978 10:07:41 PAGE 11-2 ; Execute character in A register using Data Media Emulator ; save machine state 16E9 E5 EXEC: PUSH H 16EA D5 PUSH D 16EB C5 PUSH B 16EC F5 PUSH PSW 16ED D33A OUT OFCUR ; turn off the cursor 16EF 2A4600 LHLD PCHAR 16F2 CD9417 CALL ICALL 16F5 D339 OUT ONCUR ; turn on the cursor 16F7 2A0210 LHLD CURSE ; read from cursor location to set screen cursor 16FA 7E MOV A,M 16FB F1 POP PSW 16FC C1 POP B 16FD D1 POP D 16FE E1 POP H 16FF C9 RET

Micro-Symbol LMON.;6 Thursday, October 26, 1978 10:07:41 PAGE 12 ;************************************************************************ ; Virtual terminal routine ; D,E contain address of first byte of string of input chars ; pchar is called with each of these input characters ; end of input string marked by a zero 1700 1A INTRP: LDAX D ; get next character of input string 1701 FE00 CPI 0 1703 C8 RZ ; return if end of input string 1704 CDE916 CALL EXEC ; execute the character 1707 13 INX D ; bump command string index 1708 C30017 JMP INTRP ; and get next input ;************************************************************************ ; yes/no interrogator ; prompts as follows: "y/n:” ; reprompts if bad response ; sets carry bit if answer is "y", clears if "n" 170B E5 YAN: PUSH H 170C D5 PUSH D 170D 110C19 YAN1: LXI D,YANPR ; prompt 1710 CD0017 CALL INTRP 1713 2A5600 LHLD GQUE ; get response 1716 CD9417 CALL ICALL 1719 CDE916 CALL EXEC ; and display it 171C CD7E17 CALL RAISE ; switch to upper case 171F FE4E CPI 'N' 1721 CA3317 JZ NRET ; if response was "n", return with carry bit = 0 1724 FE59 CPI 'Y' 1726 37 STC ; if "y" response, return with carry = 1 1727 CA3517 JZ YRET 172A 11C317 LXI D,ERRM2 ; output error msg, and try again 172D CD0017 CALL INTRP 1730 C30D17 JMP YAN1 1733 37 NRET: STC 1734 3F CMC 1735 D1 YRET: POP D 1736 E1 POP H 1737 C9 RET

Micro-Symbol LMON.;6 Thursday, October 26, 1978 10:07:42 PAGE 13 ;************************************************************************ ; ASCII to binary conversion routine ; input and result in A register ; input error signaled by cleared carry flag 1738 D630 ASCBN: SUI 30H ; subtract ASCII offset 173A DA4017 JC ERRAS 173D FE08 CPI 8 ; if result between 0 and 8, then return 173F D8 RC 1740 C630 ERRAS: ADI 30H ; add back offset 1742 37 STC ; clear carry bit to signal error 1743 3F CMC 1744 C9 RET ;************************************************************************ ; Get a 16 bit number entered from keyboard in octal ; input terminated by <cr> ; value returned - high order in H reg., low order in L reg ; error signaled by cleared carry bit, bit set if valid data 1745 210000 GTOCT: LXI H,0 ; initialize 1748 E5 GTOC1: PUSH H ; save partial results 1749 2A5600 LHLD GQUE 174C CD9417 CALL ICALL 174F CDE916 CALL EXEC ; display the new character 1752 FE0D CPI CR 1754 CA7B17 JZ GTRET ; finished if this is a <cr> 1757 CD3817 CALL ASCBN ; get one digit 175A DA5F17 JC GCONT 175D E1 POP H ; in case of error, return with clear carry 175E C9 RET ; and error result in A reg 175F 5F GCONT: MOV E,A ; H,L gets (partial result shifted 1760 E1 POP H ; by three bits) + H,L 1761 37 STC ; this is a 16 bit 3 position left shift 1762 3F CMC 1763 7D MOV A,L 1764 17 RAL 1765 6F MOV L,A 1766 7C MOV A,H 1767 17 RAL 1768 67 MOV H,A 1769 7D MOV A,L 176A 17 RAL 176B 6F MOV L,A 176C 7C MOV A,H 176D 17 RAL 176E 67 MOV H,A 176F 7D MOV A,L

Micro-Symbol LMON.;6 Thursday, October 26, 1978 10:07:43 PAGE 13-2 1770 17 RAL 1771 6F MOV L,A 1772 7C MOV A,H 1773 17 RAL 1774 67 MOV H,A

Micro-Symbol LMON.;6 Thursday, October 26, 1978 10:07:43 PAGE 14 1775 1600 MVI D,0 1777 19 DAD D 1778 C34817 JMP GTOC1 177B E1 GTRET: POP H 177C 37 STC ; set carry to denote valid data 177D C9 RET ;************************************************************************ ; Raise lower case to upper case argument in A register 177E FE61 RAISE: CPI ‘a’ 1780 D8 RC 1781 FE7B CPI 'z'+1 1783 D0 RNC 1784 D620 SUI 40Q ; make the upper case conversion 1786 C9 RET ;************************************************************************ ; Debug routine - prints brightened ascending digits at current ; cursor location 1787 F5 DEBUG: PUSH PSW 1788 3A1219 LDA SIGNL ; get signal character 178B CDE916 CALL EXEC ; display it 178E 3C INR A 178F 321219 STA SIGNL ; update signal character 1792 F1 POP PSW 1793 C9 RET

Micro-Symbol LMON.;6 Thursday, October 26, 1978 10:07:43 PAGE 15 ;************************************************************************ 1794 E9 ICALL: PCHL ; routine to make indirect calls to 2708 routines ;************************************************************************ ; Strings 1795 72616E736D 179A 6974207363 179F 7265656E00 ANSM: DB 'r','a','n','s','m','i','t,' ','s','c','r','e','e','n',0 17A4 6176652073 17A9 637265656E 17AE 00 AVEM: DB 'a','v','e',' ','s','c','r','e','e' ,'n',0 17AF 202D20696C 17B4 6C6567616C 17B9 20636F6D ERRM1: DB ' ','-',,'i','l','l','e','g','a','l',' ','c','o','m’ 17BD 6D616E6417 17C2 00 DB 'm','a','n','d',EEOL,0 17C3 203F207472 17C8 7920616761 17CD 696E0D0A20 17D2 00 ERRM2: DB ' ','?',' ','t','r','y',' ','a','g','a','i','n',CR,LF,’ ’,0 17D3 0D0A206C69 17D8 6E65207374 17DD 617475733A FPRMP: DB CR,LF,' ','l','i','n','e',' ','s','t','a','t','u','s',':' 17E2 201700 DB ' ',EEOL,0 17E5 6F201700 GOM: DB 'o',' ',EEOL,0 17E9 0D0A616464 17EE 726573733A 17F3 201700 GPRMP: DB CR,LF,'a','d','d','r','e’,'s','s',':',' ',EEOL,0 17F6 0D0A42202D 17FB 2062726561 1880 6B206C696E 1805 65 HELPM: DB CR,LF,'B',' ','-',' ','b','r' ,'e','a','k',' ','l','i','n','e' 1806 20636F6E6E 180B 656374696F 1810 6E DB ' ','c','o','n','n','e','c','t','i','o','n' 1811 0D0A44202D 1816 2073657420 DB CR,LF,'D',' ','-',' ' s','e','t',' ' 181B 646973706C 1820 6179206D6F 1825 6465 DB 'd','i','s','p','1','a','y',' ','m','o','d','e'

Micro-Symbol LMON.;6 Thursday, October 26, 1978 10:07:44 PAGE 15-2 1827 0D0A45202D 182C 2065786974 DB CR,LF,'E',' ','-',' ','e','x','i','t' 1831 0D0A46202D 1836 2073657420 183B 7363726565 1840 6E DB CR,LF,'F',' ','-',' ','s','e','t',' ','s','c','r','e','e','n' 1841 20666F726D 1846 6174 DB ' ','f','o','r',' m','a','t' 1848 0D0A47202D 184D 20676F2074 1852 6F20 DB CR,LF,'G',' ','-',' ','g','o',' ','t','o',' ' 1854 6164647265 1859 737320286F 185E 6374616C29 DB 'a','d','d','r','e','s','s',' ','(','o','c','t','a','1',')' 1863 0D0A4C202D 1868 206C6F676F 186D 7574206A6F 1872 62 DB CR,LF,'L',' ','-',' ','1','o','g','o','u','t',' ','j','o','b' 1873 2066726F6D 1878 20686F7374 DB ' ','f','r','o','m',' ','h','o','s','t' 187D 0D0A52202D 1882 2072657374 1887 6F726520 DB CR,LF,'R',' ','-',' ','r','e','s','t','o','r','e',' ' 188B 7363726565 1890 6E DB 's','c','r','e','e','n' 1891 0D0A53202D 1896 2073617665 189B 20 DB CR,LF,'S',' ','-',' ','s','a','v','e',' ' 189C 7363726565 18A1 6E DB 's' ,'c' ,'r' ,'e' ,'e' ,'n' 18A2 0D0A54202D 18A7 207472616E 18AC 736D697420 DB CR,LF,'T',' ','-',' ','t','r','a','n','s','m','i','t',' ' 18B1 7363726565 18B6 6E20746F20 18BB 686F7374 DB 's','c','r','e','e','n',' ','t','o',' ','h','o','s','t' 18BF 0D0A636E74 18C4 726C206368 18C9 61727300 DB CR,LF,'c','n','t','r','l',' ','c','h','a','r','s',0 18CD 202D206F6E 18D2 2F6F666628 18D7 792F6E293A LINK: DB ' ','-',' ','o','n','/','o','f','f','(','y','/','n,')',':' 18DC 2000 DB ' ',0 18DE 6F676F7574 18E3 00 OGOUT: DB 'o','g','o','u','t',0 18E4 6F726D6174 18E9 2073637265

Micro-Symbol LMON. ;6 Thursday, October 26, 1978 10:07:44 PAGE 15-3 18EE 656E1700 ORMAT: DB 'o','r','m','a','t',' ','s','c','r','e','e','n',EEOL,0 18F2 0D0A3E1700 PROMP: DB CR,LF,'>',EEOL,0 18F7 6573746F72 18FC 6520736372 1901 65656E00 RESTM: DB 'e','s','t','o','r','e',' ','s','c','r','e','e','n',0 1905 7869740D0A 190A 1700 XIT: DB 'x','i','t',CR,LF,EEOL,0 190C 792F6E3A17 1911 00 YANPR: DB 'y','/','n',':',EEOL,0 ;************************************************************************ 1912 B1 SIGNL: DB 200Q+'1' ; signal character for debug routine 1913 0108 SIGAD: DW 4001Q ; first displayed location on top line 1915 00 IDT: DB 0 ; temporary storage for terminal modes 1916 00 BKT: DB 0 1917 00 RLT: DB 0 1918 00 LCT: DB 0 1919 00 HDT: DB 0 191A 1C19 SQPTR: DW SQUEUE ; screen queue pointer and queue (must be here) 191C 00 SQUEUE: DB 0 END NO PROGRAM ERRORS

Micro-Symbol LM0N.;6 Thursday, October 26, 1978 10:07:46 PAGE 16 ABRTF 14B8 ICALL 1794 TERM 0040 ABRTG 14D5 IDMOD 1006 TOPLN 15E7 ANSM 1795 IDT 1915 TR1 16C7 ASCBN 1738 INIT 0042 TRNS0 1562 AVEM 17A4 INTRP 1700 TRNSL 16C4 BK 162B IST 004A TRNSMT 1554 BKMOD 1007 KILLJ 14DD TXCHR 0052 BKT 1916 LCMOD 1009 UNP1 1676 BLNK 1470 LCT 1918 UNPKS 1671 BREAK 1469 LF 000A UNPRT 1693 C1 15F8 LINE 005C UNSVM 15AD C2 160C LINK 18CD USTAT 003F CR 000D LN 1609 XIT 1905 CURSE 1002 LOCAL 005A YAN 170B DBGIN 0852 LSTAT 004C YAN1 170D DEBUG 1787 MON 1417 YANPR 190C DEND 0FE8 MON0 140A YRET 1735 DM 0044 MULT 0048 EEOL 0017 NCHAR 0050 ELC1 169C NLINE 0018 ELC2 16AA NRET 1733 ELCNT 1694 OFCUR 003A EOL 1659 OGOUT 18DE ERR 1460 ONCUR 0039 ERRAS 1740 ORMAT 18E4 ERRM1 17AF PCHAR 0046 ERRM2 17C3 PCK0 1648 EXEC 16E9 PCK1 164B EXIT 147F PCKS 1640 FD 15F5 PICU 003C FORM1 149C PQUE 0054 FORMT 1496 PROMP 18F2 FPRMP 17D3 PUT 16B9 FULL 004E RAISE 177E GCONT 175F RBELL 003B GET 16AE RBLNK 15DC GO 14C0 RESTM 18F7 GO1 14C6 RESTR 151E GOM 17E5 RL 1636 GPRMP 17E9 RLMOD 1008 GQ 0058 RLT 1917 GQUE 0056 SAVEM 1578 GTOC1 1748 SAVES 1542 GTOCT 1745 SBLNK 15CF GTRET 177B SIGAD 1913 HALF 0050 SIGNL 1912 HDMOD 100A SQPTR 191A HDT 1919 SQUEUE 191C HELP 156F STX 0002 HELPM 17F6 TEOL 16DA